12643334355 has 8 divisors (see below), whose sum is σ = 20229334992. Its totient is φ = 6743111648.

The previous prime is 12643334339. The next prime is 12643334359. The reversal of 12643334355 is 55343334621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12643334355 - 2⁴ = 12643334339 is a prime.

It is a super-2 number, since 2×12643334355² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12643334359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421444464 + ... + 421444493.

It is an arithmetic number, because the mean of its divisors is an integer number (2528666874).

Almost surely, 2^12643334355 is an apocalyptic number.

12643334355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12643334355 is a deficient number, since it is larger than the sum of its proper divisors (7586000637).

12643334355 is an equidigital number, since it uses as much as digits as its factorization.

12643334355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842888965.

The product of its digits is 388800, while the sum is 39.

Adding to 12643334355 its reverse (55343334621), we get a palindrome (67986668976).

The spelling of 12643334355 in words is "twelve billion, six hundred forty-three million, three hundred thirty-four thousand, three hundred fifty-five".